Hi Stefan,
I like the first one (Roger's) but the other one needs more work!
The TX is QRV on 8270.00709 +- many uHz with a carrier until
the coil arcs again but only with about 0.2 A. Looking forward
to getting more stability and 100 uW ERP.
A Rb standard is on my wishlist and more kg of copper is
in the workshop to make a new coil. I unwound a pie coil
to make a solenoid. The inductance was a bit lower but
it seems more immune to arcing.
73 and thanks
Joe VO1NA
On Wed, 7 Jun 2017, DK7FC wrote:
Hi all,
I just played a bit and searched for VLF links in the web.
Found this presentation by G3XBM:
http://www.cdarc.org.uk/downloads/presentations/VLF_Through_Ground.pdf
and the website of VO1NA: http://www.ucs.mun.ca/~jcraig/vlf.html
Both of these links were never published here, pity. But now... :-)
There may be more...
73, Stefan
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